Control system for power transmission unit of vehicle

a technology of power transmission unit and control system, which is applied in the direction of machines/engines, batteries/cells, and gearing, etc., can solve the problems of periodic fluctuation of torque input from the driving wheel side, and achieve the effect of reducing torque capacity, effective dampening of resonance, and improving durability of the vehicl
US20070202987A1Active Publication Date: 2007-08-30TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2007-08-30

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Abstract

A control system for a power transmission unit of a vehicle transmitting power outputted from a prime mover, comprising: a resonance detecting / predicting device for detecting or predicting a generation of a resonance of the power transmission unit resulting from a power transmission; a driving condition detecting device for detecting a driving condition of a vehicle in case the generation of a resonance is detected or predicted by the resonance detecting / predicting device; and a resonance dampening control selecting device for changing contents of a control for dampening the detected or predicted resonance on the basis of the driving condition of the vehicle detected by the driving condition detecting device.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] This invention relates generally to a system for controlling a power transmitting condition of a power transmission unit mounted on a vehicle, and more particularly, to a control system for dampening a resonance resulting from a transmission of power.

[0003] The disclosure of Japanese Patent Application No. 2006-053622 filed on Feb. 28, 2006 including specification, drawings and claims is incorporated herein by reference in its entirety.

[0004] 2. Related Art

[0005] An internal combustion engine such as a gasoline engine is conventionally used as a prime mover of a vehicle, and a power transmission system for transmitting a power to a driving wheel is composed mainly of a speed change mechanism. As a speed change mechanism, a geared transmission varying a speed change ratio stepwise, and a continuously variable transmission varying a speed change ratio continuously are widely known. Additionally, in recent years, an apparatus...

Claims

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